WO2019167557A1 - Control device for electrically-driven vehicle - Google Patents

Control device for electrically-driven vehicle Download PDF

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Publication number
WO2019167557A1
WO2019167557A1 PCT/JP2019/003819 JP2019003819W WO2019167557A1 WO 2019167557 A1 WO2019167557 A1 WO 2019167557A1 JP 2019003819 W JP2019003819 W JP 2019003819W WO 2019167557 A1 WO2019167557 A1 WO 2019167557A1
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WO
WIPO (PCT)
Prior art keywords
refrigerant
motor
electric vehicle
liquid level
pump
Prior art date
Application number
PCT/JP2019/003819
Other languages
French (fr)
Japanese (ja)
Inventor
忠一 植竹
春樹 石田
Original Assignee
ダイムラー・アクチェンゲゼルシャフト
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by ダイムラー・アクチェンゲゼルシャフト filed Critical ダイムラー・アクチェンゲゼルシャフト
Publication of WO2019167557A1 publication Critical patent/WO2019167557A1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K11/00—Arrangement in connection with cooling of propulsion units
    • B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility

Definitions

  • the present invention relates to a control device for an electric vehicle equipped with a motor that generates a driving force on a driving wheel of the vehicle.
  • the battery recharge control SOC
  • the regenerative braking force by the motor regenerative control may not be used.
  • forcible discharge by the electric auxiliary machine is performed, and the regenerative control of the motor can be performed by reducing the charge amount of the battery. Is considered.
  • the present invention has been made in view of such problems, and an object of the present invention is to provide a control device for an electric vehicle that can suppress battery deterioration and power consumption deterioration.
  • the present invention has been made to solve at least a part of the problems described above, and can be realized as the following aspects.
  • the control device for an electric vehicle includes a motor that generates a driving force on a driving wheel of the vehicle, and a refrigerant circulation circuit that circulates a refrigerant that cools the motor when introduced into the motor.
  • a refrigerant liquid level adjusting unit that adjusts the liquid level of the refrigerant in the motor, and a control unit that controls the braking force applied to the driving wheel by controlling the refrigerant liquid level adjusting unit.
  • the control unit controls the refrigerant liquid level adjusting unit to set the liquid level to a predetermined liquid level or higher.
  • the control device for an electric vehicle according to this aspect can apply a braking force to the drive wheels of the vehicle without performing regenerative control of the motor. Therefore, the control device for the electric vehicle according to this aspect can suppress the deterioration of the battery and the deterioration of the power consumption.
  • the refrigerant liquid level adjustment unit includes an introduction pump that introduces the refrigerant into the motor, and a discharge pump that discharges the refrigerant from the motor.
  • the unit controls the discharge pump to stop the operation of the discharge pump.
  • the control device for an electric vehicle according to the present aspect applies braking force to the drive wheels of the vehicle by using the existing equipment that has been used to introduce the refrigerant into the motor or discharge the refrigerant from the motor. Can be granted.
  • the control apparatus of the electric vehicle which concerns on this aspect can be implement
  • control device for an electric vehicle can quickly reduce the liquid level in the motor by the discharge pump.
  • control apparatus of the electric vehicle which concerns on this aspect can improve the responsiveness which returns to the state of a motor from the time of provision of braking force to the time of normal operation.
  • the refrigerant liquid level adjustment unit further includes a valve that blocks the refrigerant circulation circuit, and the control unit applies the braking force to the drive wheel, The valve is closed by controlling the valve.
  • the control device for the electric vehicle according to this aspect can quickly shut off the refrigerant circulation circuit. Thereby, the liquid level of the refrigerant
  • the valve is a reversely supported valve.
  • the control device for an electric vehicle according to this aspect can flow a certain amount when the fluid pressure suddenly increases, and can reduce the fluid pressure to a certain numerical value. .
  • the control device for the electric vehicle according to this aspect can prevent the refrigerant circulation circuit from being damaged.
  • the control device for an electric vehicle according to this aspect can prevent refrigerant leakage due to the damage.
  • control device for an electric vehicle when the control unit applies a braking force to the drive wheel, the control unit controls the introduction pump, thereby discharging the refrigerant discharged from the introduction pump. Increase. Thereby, the liquid level of the refrigerant
  • the refrigerant liquid level adjustment unit includes an introduction pump that introduces the refrigerant into the motor, and a valve that blocks the refrigerant circulation circuit, and the control unit includes: When a braking force is applied to the drive wheel, the valve is closed by controlling the valve.
  • the control device for the electric vehicle according to this aspect can quickly shut off the refrigerant circulation circuit. Thereby, the liquid level of the refrigerant
  • the refrigerant liquid level adjustment unit includes an introduction pump that introduces the refrigerant into the motor, and the control unit supplies the refrigerant from the introduction pump to the motor.
  • the introduction pump is controlled so that the introduction amount of the refrigerant becomes larger than the amount of refrigerant extracted from the motor.
  • the electric vehicle control device further includes a gradient information acquisition unit that detects the gradient of the vehicle or acquires the gradient from an external device, and the control unit is acquired by the gradient information acquisition unit. It may be determined whether or not the vehicle travels on a continuous downhill road from information on the slope of the vehicle, and the refrigerant liquid level adjusting unit may be controlled when the vehicle travels on a downhill road.
  • FIG. 1 is a schematic diagram showing a control apparatus 1 for an electric vehicle according to the first embodiment.
  • a control device 1 for an electric vehicle shown in FIG. 1 controls driving of a motor 2 that generates driving force on driving wheels of a vehicle such as an electric vehicle.
  • the control device 1 for an electric vehicle according to the first embodiment includes a refrigerant circulation circuit 3, a tank 4, a heat exchanger 15, an introduction pump 51, a discharge pump 52, a gradient information acquisition unit 6, and a control unit 7.
  • the refrigerant circulation circuit 3 includes a first pipe 3a, a second pipe 3b, a third pipe 3c, and a fourth pipe 3d.
  • the refrigerant circulating in the refrigerant circuit 3 is, for example, an oily working medium.
  • the refrigerant circulation circuit 3 in the first embodiment directly cools the heat generating portion of the motor 2 by introducing a working medium into the motor 2.
  • the working medium that has absorbed heat from the motor 2 is cooled by a heat exchanger 15 including a heat exchanger such as a radiator and a chiller.
  • the heat-emitting part in 1st Embodiment is a coil, a core, and a magnet, for example.
  • the tank 4 stores a refrigerant that cools the motor 2.
  • the refrigerant stored in the tank 4 is introduced into the motor 2 via the introduction pump 51, the heat exchanger 15, and the refrigerant circulation circuit 3. Further, the refrigerant derived from the motor 2 is stored again in the tank 4 via the discharge pump 52 and the refrigerant circulation circuit 3.
  • the introduction pump 51 introduces a refrigerant into the motor 2.
  • the inlet port P1 of the introduction pump 51 is connected to the outlet port P2 of the tank 4 via the first pipe 3a of the refrigerant circulation circuit 3.
  • the discharge port P3 of the introduction pump 51 is connected to the introduction port P4 of the motor 2 via the second pipe 3b of the refrigerant circulation circuit 3.
  • the introduction pump 51 sucks the refrigerant stored in the tank 4 from the suction port P1 through the first pipe 3a.
  • the introduction pump 51 discharges the refrigerant sucked from the suction port P1 from the discharge port P3.
  • the refrigerant discharged from the discharge port P3 of the introduction pump 51 is cooled by the heat exchanger 15.
  • the refrigerant cooled by the heat exchanger 15 flows to the inlet P4 of the motor 2 through the second pipe 3b.
  • the introduction pump 51 introduces the refrigerant into the motor 2.
  • the discharge pump 52 discharges the refrigerant from the motor 2.
  • the suction port P5 of the discharge pump 52 is connected to the outlet port P6 of the motor 2 through the third pipe 3c of the refrigerant circulation circuit 3.
  • the discharge port P7 of the discharge pump 52 is connected to the introduction port P8 of the tank 4 via the fourth pipe 3d of the refrigerant circulation circuit 3.
  • the discharge pump 52 sucks the refrigerant in the motor 2 from the suction port P5 through the third pipe 3c.
  • the discharge pump 52 discharges the sucked refrigerant from the discharge port P7.
  • the refrigerant discharged from the discharge port P7 flows to the introduction port P8 of the tank 4 through the fourth pipe 3d. Thereby, the discharge pump 52 discharges the refrigerant from the motor 2.
  • the introduction pump 51 and the discharge pump 52 function as a refrigerant level adjustment unit that adjusts the refrigerant level in the motor 2.
  • the gradient information acquisition unit 6 is mounted on the vehicle and detects the gradient of the vehicle. Note that acquiring the vehicle gradient from an external device (not shown) connected to the gradient information acquisition unit 6 is also included as a function of the gradient information acquisition unit 6 in the first embodiment.
  • the control unit 7 includes a CPU (Central Processing Unit) and M as hardware resources. A predetermined processor of a PU (Micro Processing Unit) is included.
  • the control unit 7 can communicate with a VCU (Vehicle Control Unit) that is a control unit for the entire vehicle and an inverter that controls the motor.
  • VCU Vehicle Control Unit
  • the control unit 7 in the first embodiment controls the braking force applied to the drive wheels of the vehicle by controlling the operation of each of the introduction pump 51 and the discharge pump 52. For example, the control unit 7 determines whether or not the vehicle travels on a continuous downhill road from information (gradient information) related to the vehicle gradient acquired by the gradient information acquiring unit 6. When the vehicle travels on the downhill road, the control unit 7 controls the operation of each of the introduction pump 51 and the discharge pump 52 to set the liquid level in the motor 2 to a predetermined liquid level or higher.
  • control unit 7 stops the operation of the discharge pump 52 when a braking force is further applied to the drive wheels of the vehicle. Since the operation of the discharge pump 52 is stopped, the refrigerant is not led out from the motor 2 and the refrigerant stays in the motor 2. On the other hand, the introduction pump 51 continues to operate normally under the control of the control unit 7. For this reason, the liquid level of the refrigerant in the motor 2 rises.
  • FIG. 2 is a diagram showing the liquid level of the refrigerant in the motor 2 before and after controlling the operation of each of the introduction pump 51 and the discharge pump 52 in the control unit 7 according to the first embodiment.
  • the liquid level of the refrigerant in the motor 2 substantially matches the height of the outlet P6 of the motor 2. .
  • the liquid level of the refrigerant in the motor 2 substantially coincides with the height of the introduction port P4 of the motor 2. ing. That is, it is understood that the liquid level of the refrigerant in the motor 2 is increased by controlling the operations of the introduction pump 51 and the discharge pump 52.
  • control device 1 for an electric vehicle can further apply a braking force to the drive wheels of the vehicle.
  • the control device 1 for an electric vehicle includes the refrigerant circulation circuit 3, the introduction pump 51, the discharge pump 52, and the control unit 7.
  • the refrigerant circulation circuit 3 the refrigerant for cooling the motor 2 is circulated by being introduced into the motor 2.
  • the introduction pump 51 introduces a refrigerant into the motor 2.
  • the discharge pump 52 discharges the refrigerant from the motor 2.
  • the controller 7 controls the braking force applied to the drive wheels of the vehicle by controlling the operation of each of the introduction pump 51 and the discharge pump 52.
  • the control unit 7 stops the operation of the discharge pump 52. Since the operation of the discharge pump 52 is stopped, the refrigerant is not led out from the motor 2 and the refrigerant stays in the motor 2. On the other hand, the introduction pump 51 continues to operate normally under the control of the control unit 7. For this reason, the liquid level of the refrigerant in the motor 2 rises. As the liquid level of the refrigerant in the motor 2 increases, fluid friction due to the refrigerant increases. Thereby, generation
  • the control device 1 for the electric vehicle according to the first embodiment can suppress the deterioration of the battery and the deterioration of the electric power consumption.
  • the control apparatus 1 of the electric vehicle which concerns on 1st Embodiment uses the existing apparatus used in order to introduce
  • the control apparatus 1 for the electric vehicle according to the first embodiment can be realized without introducing a new device, and the cost for introducing the new device can be suppressed.
  • the control device 1 for an electric vehicle according to the first embodiment can quickly reduce the liquid level in the motor 2 by the discharge pump 52. For this reason, the control apparatus 1 of the electric vehicle which concerns on 1st Embodiment can improve the responsiveness which returns the state of the motor 2 from the time of provision of braking force to the time of normal operation.
  • the control unit 7 in the first embodiment stops the operation of the discharge pump 52 and operates the introduction pump 51 normally when further applying a braking force to the drive wheels of the vehicle.
  • the control unit 7 in the first embodiment increases the discharge amount of the refrigerant discharged from the introduction pump 51 more than the discharge amount of the refrigerant discharged from the discharge pump 52 when the braking force is applied to the driving wheels of the vehicle.
  • each of the introduction pump 51 and the discharge pump 52 may be controlled.
  • the control unit 7 increases the discharge amount of the refrigerant discharged from the introduction pump 51 and operates the discharge pump 52 normally.
  • control unit 7 increases the discharge amount of the refrigerant discharged from the introduction pump 51 and decreases the discharge amount of the refrigerant discharged from the discharge pump 52.
  • control unit 7 operates the introduction pump 51 normally to reduce the discharge amount of the refrigerant discharged from the discharge pump 52.
  • the control apparatus 1 of the electric vehicle which concerns on 1st Embodiment can provide a braking force to the driving wheel of a vehicle, maintaining the cooling performance of the motor 2 by a refrigerant
  • the control unit 7 in the first embodiment not only stops the operation of the discharge pump 52 but also increases the discharge amount of the refrigerant discharged from the introduction pump 51 when applying braking force to the drive wheels of the vehicle. May be. Thereby, the liquid level of the refrigerant
  • FIG. 3 is a schematic diagram showing a control device 8 for an electric vehicle according to the second embodiment.
  • the electric vehicle control device 8 shown in FIG. 3 is obtained by replacing the discharge pump 52 included in the electric vehicle control device 1 according to the first embodiment with a valve 9 that shuts off the refrigerant circulation circuit 3.
  • the second embodiment descriptions overlapping with those in the first embodiment are omitted, and portions different from the first embodiment will be mainly described.
  • valve 3 is a two-way electromagnetic valve that opens and closes under the control of the control unit 10, for example.
  • the inlet P9 of the valve 9 is connected to the outlet P6 of the motor 2 via the third pipe 3c.
  • the outlet P10 of the valve 9 is connected to the inlet P8 of the tank 4 via the fourth pipe 3d.
  • the introduction pump 51 and the valve 9 function as a refrigerant liquid level adjusting unit that adjusts the liquid level of the refrigerant in the motor 2.
  • the control unit 10 includes a CPU and a predetermined processor of MPU as hardware resources.
  • the control unit 10 controls the braking force applied to the drive wheels of the vehicle by controlling the operations of the introduction pump 51 and the valve 9. For example, the control unit 10 determines whether or not the vehicle travels on a continuous downhill road from the gradient information acquired by the gradient information acquisition unit 6. When the vehicle travels on a downhill road, the control unit 10 controls the operation of the introduction pump 51 and the valve 9 to set the liquid level in the motor 2 to a predetermined liquid level or higher.
  • control unit 10 closes the valve 9 when applying a braking force to the drive wheels of the vehicle. Since the valve 9 is closed, the refrigerant is not led out from the motor 2 and the refrigerant stays in the motor 2. On the other hand, the introduction pump 51 continues to operate normally under the control of the control unit 10. For this reason, the liquid level of the refrigerant in the motor 2 rises.
  • control device 8 for an electric vehicle can apply a braking force to the drive wheels of the vehicle.
  • the control device 8 for an electric vehicle includes the refrigerant circulation circuit 3, the introduction pump 51, the valve 9, and the control unit 10.
  • the refrigerant circulation circuit 3 the refrigerant for cooling the motor 2 is circulated by being introduced into the motor 2.
  • the introduction pump 51 introduces a refrigerant into the motor 2.
  • the valve 9 blocks the refrigerant circulation circuit 3.
  • the control unit 10 controls the braking force applied to the drive wheels of the vehicle by controlling the operations of the introduction pump 51 and the valve 9.
  • the control unit 10 closes the valve 9. Since the valve 9 is closed, the refrigerant is not led out from the motor 2 and the refrigerant stays in the motor 2. On the other hand, the introduction pump 51 continues to operate normally under the control of the control unit 10. For this reason, the liquid level of the refrigerant in the motor 2 rises. As the liquid level of the refrigerant in the motor 2 increases, fluid friction due to the refrigerant increases. Thereby, generation
  • control device 8 for the electric vehicle according to the second embodiment can suppress the deterioration of the battery and the deterioration of the power consumption.
  • control device 8 for an electric vehicle according to the second embodiment can quickly shut off the refrigerant circulation circuit 3 as compared with the discharge pump 52 by using the valve 9 instead of the discharge pump 52.
  • coolant in the motor 2 can be raised rapidly. That is, the control device 8 for an electric vehicle according to the second embodiment can quickly apply a braking force to the drive wheels of the vehicle.
  • FIG. 4 is a schematic diagram showing a control device 11 for an electric vehicle according to the third embodiment.
  • the electric vehicle control device 11 shown in FIG. 4 is a device in which a valve 9 that shuts off the refrigerant circulation circuit 3 is further installed in the electric vehicle control device 1 according to the first embodiment.
  • the description overlapping with the first embodiment and the second embodiment is omitted, and portions different from the first embodiment and the second embodiment will be mainly described.
  • first pipe 3a includes a first pipe 3a, a second pipe 3b, a third pipe 3c, a fourth pipe 3d, and a fifth pipe 3e.
  • the 4 is a two-way electromagnetic valve that opens and closes under the control of the control unit 12, for example.
  • the inlet P9 of the valve 9 is connected to the outlet P6 of the motor 2 via the fifth pipe 3e.
  • the outlet P10 of the valve 9 is connected to the inlet P5 of the discharge pump 52 via the third pipe 3c.
  • the discharge port P7 of the discharge pump 52 is connected to the introduction port P8 of the tank 4 via the fourth pipe 3d.
  • you may replace the installation location of the discharge pump 52 and the valve 9.
  • the introduction pump 51, the discharge pump 52, and the valve 9 function as a refrigerant liquid level adjusting unit that adjusts the liquid level of the refrigerant in the motor 2.
  • the control unit 12 includes a CPU and a predetermined processor of MPU as hardware resources.
  • the control unit 12 controls the braking force applied to the drive wheels of the vehicle by controlling the operations of the introduction pump 51, the discharge pump 52, and the valve 9. For example, the control unit 12 determines whether or not the vehicle travels on a continuous downhill road from the gradient information acquired by the gradient information acquisition unit 6. When the vehicle travels on a downhill road, the control unit 12 controls the operation of each of the introduction pump 51, the discharge pump 52, and the valve 9 to set the liquid level in the motor 2 to a predetermined liquid level or higher.
  • control unit 12 stops the operation of the discharge pump 52 when further applying a braking force to the drive wheels of the vehicle. Further, the control unit 12 closes the valve 9. Since the valve 9 is closed, the refrigerant is not led out from the motor 2 and the refrigerant stays in the motor 2. On the other hand, the introduction pump 51 continues to operate normally under the control of the control unit 12. For this reason, the liquid level of the refrigerant in the motor 2 rises.
  • the control device 11 for an electric vehicle can apply a braking force to the drive wheels of the vehicle.
  • the control device 11 for an electric vehicle includes the refrigerant circulation circuit 3, the introduction pump 51, the discharge pump 52, the valve 9, and the control unit 12.
  • the refrigerant circulation circuit 3 the refrigerant for cooling the motor 2 is circulated by being introduced into the motor 2.
  • the introduction pump 51 introduces a refrigerant into the motor 2.
  • the discharge pump 52 discharges the refrigerant from the motor 2.
  • the valve 9 blocks the refrigerant circulation circuit 3.
  • the control unit 12 controls the braking force applied to the driving wheels of the vehicle by controlling the operations of the introduction pump 51, the discharge pump 52, and the valve 9.
  • the control unit 12 stops the operation of the discharge pump 52. Further, the control unit 12 closes the valve 9. Since the valve 9 is closed, the refrigerant is not led out from the motor 2 and the refrigerant stays in the motor 2. On the other hand, the introduction pump 51 continues to operate normally under the control of the control unit 12. For this reason, the liquid level of the refrigerant in the motor 2 rises. As the liquid level of the refrigerant in the motor 2 increases, fluid friction due to the refrigerant increases. Thereby, generation
  • the control device 11 of the electric vehicle according to the third embodiment can suppress the deterioration of the battery and the deterioration of the power consumption. Moreover, the control apparatus 11 of the electric vehicle which concerns on 3rd Embodiment can reduce the liquid level in the motor 2 rapidly with the discharge pump 52. FIG. For this reason, the control apparatus 11 of the electric vehicle which concerns on 3rd Embodiment can improve the responsiveness which returns the state of the motor 2 from the time of provision of braking force to the time of normal operation. Moreover, the control apparatus 11 of the electric vehicle which concerns on 3rd Embodiment can interrupt
  • the control unit 12 in the third embodiment when applying a braking force to the driving wheels of the vehicle, not only stops the operation of the discharge pump 52 and closes the valve 9 but also discharges from the introduction pump 51.
  • the discharge amount of the refrigerant may be increased.
  • coolant in the motor 2 can be raised rapidly. That is, the control device 11 for an electric vehicle according to the third embodiment can quickly apply a braking force to the drive wheels of the vehicle.
  • a check valve may be used as the valve 9.
  • the check valve is for preventing the refrigerant flowing through the refrigerant circulation circuit 3 from flowing backward.
  • the check valve is opened when the difference between the hydraulic pressures before and after the check valve exceeds a predetermined threshold.
  • the control device 11 of the electric vehicle according to the third embodiment uses a check valve as the valve 9 so that a certain amount can flow when the fluid pressure suddenly increases, and the fluid pressure is reduced to a certain value. Can be made. For this reason, the control device 11 for the electric vehicle according to the third embodiment can prevent the refrigerant circulation circuit 3 from being damaged.
  • the control apparatus 11 of the electric vehicle which concerns on 3rd Embodiment can prevent the refrigerant
  • FIG. 5 is a schematic diagram showing the control device 13 for an electric vehicle according to the fourth embodiment.
  • the control device 13 for the electric vehicle shown in FIG. 5 is realized only by the introduction pump 51, unlike the above embodiment.
  • the third embodiment descriptions overlapping with the first to third embodiments are omitted, and different parts from the first to third embodiments are mainly described.
  • the outlet P6 of the motor 2 is connected to the inlet P8 of the tank 4 via the fifth pipe 3e.
  • the introduction pump 51 functions as a refrigerant liquid level adjusting unit that adjusts the liquid level of the refrigerant in the motor 2.
  • the control unit 14 includes a CPU and a predetermined processor of MPU as hardware resources.
  • the control unit 14 controls the braking force applied to the drive wheels of the vehicle by controlling the operation of the introduction pump 51. For example, the control unit 14 determines whether or not the vehicle travels on a continuous downhill road from the gradient information acquired by the gradient information acquisition unit 6. When the vehicle travels on a downhill road, the control unit 14 controls the operation of the introduction pump 51 to set the liquid level in the motor 2 to a predetermined liquid level or higher.
  • the control unit 14 further applies a braking force to the drive wheels of the vehicle, the amount of refrigerant introduced from the introduction pump 51 to the motor 2 is larger than the amount of refrigerant drawn from the motor 2. Thus, the discharge amount of the refrigerant from the introduction pump 51 is controlled. For this reason, the liquid level of the refrigerant in the motor 2 rises.
  • control device 13 for an electric vehicle can further apply a braking force to the drive wheels of the vehicle.
  • the control device 13 for the electric vehicle includes the refrigerant circulation circuit 3, the introduction pump 51, and the control unit 14.
  • the refrigerant circulation circuit 3 the refrigerant for cooling the motor 2 is circulated by being introduced into the motor 2.
  • the introduction pump 51 introduces a refrigerant into the motor 2.
  • the control unit 14 controls the braking force applied to the drive wheels of the vehicle by controlling the operation of the introduction pump 51.
  • the control unit 14 controls the amount of refrigerant discharged from the introduction pump 51 so that the amount of refrigerant introduced from the introduction pump 51 to the motor 2 is greater than the amount of refrigerant derived from the motor 2. For this reason, the liquid level of the refrigerant in the motor 2 rises. As the liquid level of the refrigerant in the motor 2 increases, fluid friction due to the refrigerant increases. Thereby, generation
  • control device 13 for the electric vehicle according to the fourth embodiment can suppress the deterioration of the battery and the deterioration of the power consumption. Moreover, since the control apparatus 13 of the electric vehicle which concerns on 4th Embodiment can be implement
  • each component (each processing unit) of the present embodiment is not limited to a single processor, and may be realized by a plurality of processors. Furthermore, a plurality of components (a plurality of processing units) may be realized by a single processor.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

[Problem] To provide a control device which is for an electrically-driven vehicle and which is capable of suppressing deterioration of a battery and degradation of power consumption. [Solution] This control device for an electrically-driven vehicle, on which a motor for causing drive wheels of the vehicle to generate a driving force is mounted, includes: a refrigerant circulation circuit in which a refrigerant introduced into the motor to cool the motor circulates; a refrigerant liquid level adjustment unit that adjusts the liquid level of the refrigerant in the motor; and a control unit that controls a braking force applied to the drive wheels by controlling the refrigerant liquid level adjustment unit.

Description

電動車両の制御装置Control device for electric vehicle
　本発明は、車両の駆動輪に駆動力を発生させるモータを搭載する電動車両の制御装置に関する。 The present invention relates to a control device for an electric vehicle equipped with a motor that generates a driving force on a driving wheel of the vehicle.
　例えば、電気自動車が連続降坂路を走行する場合、モータの回生制御によりバッテリ充電量（ＳＯＣ）が満充電となり、モータの回生制御による回生制動力を利用できなくなる虞がある。このような状況を回避するため、下記特許文献１に開示されるように、電動補機による強制放電を実施し、バッテリの充電量を低下させることでモータの回生制御を実施できるようにすることが検討される。 For example, when an electric vehicle travels on a continuous downhill road, the battery recharge control (SOC) is fully charged by the motor regenerative control, and the regenerative braking force by the motor regenerative control may not be used. In order to avoid such a situation, as disclosed in Patent Document 1 below, forcible discharge by the electric auxiliary machine is performed, and the regenerative control of the motor can be performed by reducing the charge amount of the battery. Is considered.
特開２０１２－１１１２７０号公報JP 2012-111270 A
　しかしながら、連続降坂路をこのような制御を実施しながら走行した場合、電動補機による強制放電と回生充電を頻繁に繰り返すこととなり、バッテリ劣化や不用な強制放電に起因する電費悪化につながる虞がある。 However, when traveling on a continuous downhill road while performing such control, forced discharge and regenerative charging by the electric auxiliary machine are frequently repeated, which may lead to deterioration of battery costs and power consumption deterioration due to unnecessary forced discharge. is there.
　本発明はこのような課題に鑑みてなされたものであり、その目的とするところは、バッテリの劣化および電費悪化を抑制することができる電動車両の制御装置を提供することにある。 The present invention has been made in view of such problems, and an object of the present invention is to provide a control device for an electric vehicle that can suppress battery deterioration and power consumption deterioration.
　本発明は前述の課題の少なくとも一部を解決するためになされたものであり、以下の態様として実現することができる。 The present invention has been made to solve at least a part of the problems described above, and can be realized as the following aspects.
　本態様に係る電動車両の制御装置は、車両の駆動輪に駆動力を発生させるモータを搭載するものにおいて、前記モータ内に導入されることにより前記モータを冷却する冷媒が循環する冷媒循環回路と、前記モータ内における前記冷媒の液位を調整する冷媒液位調整部と、前記冷媒液位調整部を制御することにより、前記駆動輪にかかる制動力を制御する制御部と、を含む。 The control device for an electric vehicle according to the present aspect includes a motor that generates a driving force on a driving wheel of the vehicle, and a refrigerant circulation circuit that circulates a refrigerant that cools the motor when introduced into the motor. A refrigerant liquid level adjusting unit that adjusts the liquid level of the refrigerant in the motor, and a control unit that controls the braking force applied to the driving wheel by controlling the refrigerant liquid level adjusting unit.
　本態様に係る電動車両の制御装置によれば、制御部は、冷媒液位調整部を制御することにより、液位を所定の液位以上とする。モータ内の冷媒の液位の上昇に伴い、冷媒による流体摩擦が上昇する。これにより、モータによる駆動力の発生が制限される。すなわち、本態様に係る電動車両の制御装置は、モータの回生制御を実行しなくても、上記車両の駆動輪に制動力を付与することができる。したがって、本態様に係る電動車両の制御装置は、バッテリの劣化および電費悪化を抑制することができる。 According to the control apparatus for an electric vehicle according to this aspect, the control unit controls the refrigerant liquid level adjusting unit to set the liquid level to a predetermined liquid level or higher. As the liquid level of the refrigerant in the motor increases, fluid friction due to the refrigerant increases. Thereby, generation | occurrence | production of the driving force by a motor is restrict | limited. In other words, the control device for an electric vehicle according to this aspect can apply a braking force to the drive wheels of the vehicle without performing regenerative control of the motor. Therefore, the control device for the electric vehicle according to this aspect can suppress the deterioration of the battery and the deterioration of the power consumption.
　また、本態様に係る電動車両の制御装置において、前記冷媒液位調整部は、前記モータ内に前記冷媒を導入する導入ポンプ、及び前記モータ内から前記冷媒を排出する排出ポンプを含み、前記制御部は、前記駆動輪に制動力を付与する場合、前記排出ポンプを制御することで、前記排出ポンプの動作を停止する。これにより、本態様に係る電動車両の制御装置は、冷媒をモータ内に導入、又はモータ内から排出するために用いられていた既存の設備を利用することで上記車両の駆動輪に制動力を付与することができる。このため、新たな設備を導入することなく、本態様に係る電動車両の制御装置を実現でき、かつ新たな設備を導入するためのコストを抑制することができる。また、本態様に係る電動車両の制御装置は、排出ポンプにより早急にモータ内の液位を低下させることができる。このため、本態様に係る電動車両の制御装置は、制動力の付与時から通常動作時へモータの状態に戻す応答性を向上することができる。 Further, in the control device for an electric vehicle according to this aspect, the refrigerant liquid level adjustment unit includes an introduction pump that introduces the refrigerant into the motor, and a discharge pump that discharges the refrigerant from the motor. When the braking force is applied to the drive wheel, the unit controls the discharge pump to stop the operation of the discharge pump. As a result, the control device for an electric vehicle according to the present aspect applies braking force to the drive wheels of the vehicle by using the existing equipment that has been used to introduce the refrigerant into the motor or discharge the refrigerant from the motor. Can be granted. For this reason, the control apparatus of the electric vehicle which concerns on this aspect can be implement | achieved, without introducing a new installation, and the cost for introducing a new installation can be suppressed. Moreover, the control device for an electric vehicle according to this aspect can quickly reduce the liquid level in the motor by the discharge pump. For this reason, the control apparatus of the electric vehicle which concerns on this aspect can improve the responsiveness which returns to the state of a motor from the time of provision of braking force to the time of normal operation.
　また、本態様に係る電動車両の制御装置において、前記冷媒液位調整部は、前記冷媒循環回路を遮断するバルブをさらに含み、前記制御部は、前記駆動輪に制動力を付与する場合、前記バルブを制御することで、前記バルブを閉鎖する。本態様に係る電動車両の制御装置は、冷媒循環回路を早急に遮断することができる。これにより、モータ内の冷媒の液位を早急に上昇することができる。すなわち、本態様に係る電動車両の制御装置は、車両の駆動輪に早急に制動力を付与することができる。 Further, in the control device for an electric vehicle according to this aspect, the refrigerant liquid level adjustment unit further includes a valve that blocks the refrigerant circulation circuit, and the control unit applies the braking force to the drive wheel, The valve is closed by controlling the valve. The control device for the electric vehicle according to this aspect can quickly shut off the refrigerant circulation circuit. Thereby, the liquid level of the refrigerant | coolant in a motor can be raised rapidly. That is, the control device for an electric vehicle according to this aspect can quickly apply a braking force to the drive wheels of the vehicle.
　また、本態様に係る電動車両の制御装置において、前記バルブは、逆支弁である。本態様に係る電動車両の制御装置は、前記バルブとして逆止弁を用いることで、液圧が急激に上昇した場合に一定量流すことができ、液圧を一定の数値まで低下させることができる。このため、本態様に係る電動車両の制御装置は、冷媒循環回路の破損を防止することができる。また、本態様に係る電動車両の制御装置は、上記破損による冷媒漏れを防止することができる。 In the electric vehicle control device according to this aspect, the valve is a reversely supported valve. By using a check valve as the valve, the control device for an electric vehicle according to this aspect can flow a certain amount when the fluid pressure suddenly increases, and can reduce the fluid pressure to a certain numerical value. . For this reason, the control device for the electric vehicle according to this aspect can prevent the refrigerant circulation circuit from being damaged. In addition, the control device for an electric vehicle according to this aspect can prevent refrigerant leakage due to the damage.
　また、本態様に係る電動車両の制御装置において、前記制御部は、前記駆動輪に制動力を付与する場合、前記導入ポンプを制御することで、前記導入ポンプから吐出される前記冷媒の吐出量を増加させる。これにより、モータ内の冷媒の液位を早急に上昇することができる。すなわち、本態様に係る電動車両の制御装置は、車両の駆動輪に早急に制動力を付与することができる。 Moreover, in the control device for an electric vehicle according to this aspect, when the control unit applies a braking force to the drive wheel, the control unit controls the introduction pump, thereby discharging the refrigerant discharged from the introduction pump. Increase. Thereby, the liquid level of the refrigerant | coolant in a motor can be raised rapidly. That is, the control device for an electric vehicle according to this aspect can quickly apply a braking force to the drive wheels of the vehicle.
　また、本態様に係る電動車両の制御装置において、前記冷媒液位調整部は、前記モータ内に前記冷媒を導入する導入ポンプ、及び前記冷媒循環回路を遮断するバルブを含み、前記制御部は、前記駆動輪に制動力を付与する場合、前記バルブを制御することで、前記バルブを閉鎖する。本態様に係る電動車両の制御装置は、冷媒循環回路を早急に遮断することができる。これにより、モータ内の冷媒の液位を早急に上昇することができる。すなわち、本態様に係る電動車両の制御装置は、車両の駆動輪に早急に制動力を付与することができる。 Further, in the control device for an electric vehicle according to this aspect, the refrigerant liquid level adjustment unit includes an introduction pump that introduces the refrigerant into the motor, and a valve that blocks the refrigerant circulation circuit, and the control unit includes: When a braking force is applied to the drive wheel, the valve is closed by controlling the valve. The control device for the electric vehicle according to this aspect can quickly shut off the refrigerant circulation circuit. Thereby, the liquid level of the refrigerant | coolant in a motor can be raised rapidly. That is, the control device for an electric vehicle according to this aspect can quickly apply a braking force to the drive wheels of the vehicle.
　また、本態様に係る電動車両の制御装置において、前記冷媒液位調整部は、前記モータ内に前記冷媒を導入する導入ポンプを含み、前記制御部は、前記導入ポンプから前記モータへの前記冷媒の導入量が前記モータからの前記冷媒の導出量より多くなるように前記導入ポンプを制御する。これにより、本態様に係る電動車両の制御装置は、最小限の構成で実現することができるため、設置のための導入コストを抑制することができる。 Moreover, in the control apparatus for an electric vehicle according to this aspect, the refrigerant liquid level adjustment unit includes an introduction pump that introduces the refrigerant into the motor, and the control unit supplies the refrigerant from the introduction pump to the motor. The introduction pump is controlled so that the introduction amount of the refrigerant becomes larger than the amount of refrigerant extracted from the motor. Thereby, since the control apparatus of the electric vehicle which concerns on this aspect can be implement | achieved by the minimum structure, it can suppress the introduction cost for installation.
　また、本態様に係る電動車両の制御装置において、前記車両の勾配を検出、又は外部装置から取得する勾配情報取得部をさらに含み、前記制御部は、前記勾配情報取得部により取得された前記車両の勾配に関する情報から前記車両が連続的な降坂路を走行するか否かを判断し、前記車両が降坂路を走行する場合に前記冷媒液位調整部を制御してもよい。 The electric vehicle control device according to this aspect further includes a gradient information acquisition unit that detects the gradient of the vehicle or acquires the gradient from an external device, and the control unit is acquired by the gradient information acquisition unit. It may be determined whether or not the vehicle travels on a continuous downhill road from information on the slope of the vehicle, and the refrigerant liquid level adjusting unit may be controlled when the vehicle travels on a downhill road.
第１実施形態に係る電動車両の制御装置を示す模式図である。It is a schematic diagram which shows the control apparatus of the electric vehicle which concerns on 1st Embodiment. 導入ポンプ及び排出ポンプ各々の動作を制御する前後でのモータ内の冷媒の液位を示す図である。It is a figure which shows the liquid level of the refrigerant | coolant in a motor before and behind controlling operation | movement of each of an introduction pump and a discharge pump. 第２実施形態に係る電動車両の制御装置を示す模式図である。It is a schematic diagram which shows the control apparatus of the electric vehicle which concerns on 2nd Embodiment. 第３実施形態に係る電動車両の制御装置を示す模式図である。It is a schematic diagram which shows the control apparatus of the electric vehicle which concerns on 3rd Embodiment. 第４実施形態に係る電動車両の制御装置を示す模式図である。It is a schematic diagram which shows the control apparatus of the electric vehicle which concerns on 4th Embodiment.
　以下、本発明の一実施形態に係る電動車両の制御装置について、図面を参照して説明する。なお、本実施形態は以下に説明する内容に限定されるものではなく、その要旨を変更しない範囲において任意に変更して実施することが可能である。また、実施形態の説明に用いる図面は、いずれも構成部材を模式的に示すものであって、理解を深めるべく部分的な強調、拡大、縮小、または省略などを行っており、構成部材の縮尺や形状等を正確に表すものとはなっていない場合がある。 Hereinafter, an electric vehicle control apparatus according to an embodiment of the present invention will be described with reference to the drawings. In addition, this embodiment is not limited to the content demonstrated below, In the range which does not change the summary, it can change arbitrarily and can implement. In addition, the drawings used for the description of the embodiments schematically show the constituent members, and are partially emphasized, enlarged, reduced, or omitted to deepen the understanding. And may not accurately represent the shape or the like.
（第１実施形態）
　図１は、第１実施形態に係る電動車両の制御装置１を示す模式図である。図１に示す電動車両の制御装置１は、電気自動車等の車両の駆動輪に駆動力を発生させるモータ２の駆動を制御する。例えば、第１実施形態に係る電動車両の制御装置１は、冷媒循環回路３、タンク４、熱交換器１５、導入ポンプ５１、排出ポンプ５２、勾配情報取得部６、及び制御部７を含む。 (First embodiment)
FIG. 1 is a schematic diagram showing a control apparatus 1 for an electric vehicle according to the first embodiment. A control device 1 for an electric vehicle shown in FIG. 1 controls driving of a motor 2 that generates driving force on driving wheels of a vehicle such as an electric vehicle. For example, the control device 1 for an electric vehicle according to the first embodiment includes a refrigerant circulation circuit 3, a tank 4, a heat exchanger 15, an introduction pump 51, a discharge pump 52, a gradient information acquisition unit 6, and a control unit 7.
　冷媒循環回路３は、第１配管３ａ、第２配管３ｂ、第３配管３ｃ、及び第４配管３ｄにより構成される。冷媒循環回路３内では、上記モータ２内に導入されることによりモータ２を冷却する冷媒が循環する。冷媒循環回路３を循環する冷媒は、例えば、油性の作動媒体である。第１実施形態における冷媒循環回路３は、モータ２内に作動媒体を導入することで、モータ２の発熱部位を直接冷却する。モータ２から熱を吸収した作動媒体は、ラジエータ、及びチラー等の熱交換手段からなる熱交換器１５により冷却される。なお、第１実施形態における発熱部位は、例えば、コイル、コア、及び磁石である。 The refrigerant circulation circuit 3 includes a first pipe 3a, a second pipe 3b, a third pipe 3c, and a fourth pipe 3d. In the refrigerant circulation circuit 3, the refrigerant for cooling the motor 2 is circulated by being introduced into the motor 2. The refrigerant circulating in the refrigerant circuit 3 is, for example, an oily working medium. The refrigerant circulation circuit 3 in the first embodiment directly cools the heat generating portion of the motor 2 by introducing a working medium into the motor 2. The working medium that has absorbed heat from the motor 2 is cooled by a heat exchanger 15 including a heat exchanger such as a radiator and a chiller. In addition, the heat-emitting part in 1st Embodiment is a coil, a core, and a magnet, for example.
　タンク４は、モータ２を冷却する冷媒を貯蔵する。タンク４に貯蔵された冷媒は、導入ポンプ５１、熱交換器１５及び冷媒循環回路３を経由して、モータ２に導入される。また、モータ２から導出された冷媒は、排出ポンプ５２及び冷媒循環回路３を経由して、再びタンク４で貯蔵される。 The tank 4 stores a refrigerant that cools the motor 2. The refrigerant stored in the tank 4 is introduced into the motor 2 via the introduction pump 51, the heat exchanger 15, and the refrigerant circulation circuit 3. Further, the refrigerant derived from the motor 2 is stored again in the tank 4 via the discharge pump 52 and the refrigerant circulation circuit 3.
　導入ポンプ５１は、モータ２内に冷媒を導入する。導入ポンプ５１の吸入口Ｐ１は、冷媒循環回路３の第１配管３ａを介して、タンク４の導出口Ｐ２に接続される。また、導入ポンプ５１の吐出口Ｐ３は、冷媒循環回路３の第２配管３ｂを介して、モータ２の導入口Ｐ４に接続される。導入ポンプ５１は、第１配管３ａを介して、タンク４に貯蔵された冷媒を吸入口Ｐ１から吸入する。導入ポンプ５１は、吸入口Ｐ１から吸入した冷媒を吐出口Ｐ３から吐出する。このとき、導入ポンプ５１の吐出口Ｐ３から吐出した冷媒は、熱交換器１５により冷却される。さらに、熱交換器１５により冷却された冷媒は、第２配管３ｂを介して、モータ２の導入口Ｐ４へ流れる。これにより、導入ポンプ５１は、モータ２内に冷媒を導入する。 The introduction pump 51 introduces a refrigerant into the motor 2. The inlet port P1 of the introduction pump 51 is connected to the outlet port P2 of the tank 4 via the first pipe 3a of the refrigerant circulation circuit 3. The discharge port P3 of the introduction pump 51 is connected to the introduction port P4 of the motor 2 via the second pipe 3b of the refrigerant circulation circuit 3. The introduction pump 51 sucks the refrigerant stored in the tank 4 from the suction port P1 through the first pipe 3a. The introduction pump 51 discharges the refrigerant sucked from the suction port P1 from the discharge port P3. At this time, the refrigerant discharged from the discharge port P3 of the introduction pump 51 is cooled by the heat exchanger 15. Furthermore, the refrigerant cooled by the heat exchanger 15 flows to the inlet P4 of the motor 2 through the second pipe 3b. Thereby, the introduction pump 51 introduces the refrigerant into the motor 2.
　排出ポンプ５２は、モータ２内から冷媒を排出する。排出ポンプ５２の吸入口Ｐ５は、冷媒循環回路３の第３配管３ｃを介して、モータ２の導出口Ｐ６に接続される。排出ポンプ５２の吐出口Ｐ７は、冷媒循環回路３の第４配管３ｄを介して、タンク４の導入口Ｐ８に接続される。排出ポンプ５２は、第３配管３ｃを介して、モータ２内の冷媒を吸入口Ｐ５から吸入する。排出ポンプ５２は、吸入した冷媒を吐出口Ｐ７から吐出する。吐出口Ｐ７から吐出した冷媒は、第４配管３ｄを介して、タンク４の導入口Ｐ８へ流れる。これにより、排出ポンプ５２は、モータ２内から冷媒を排出する。 The discharge pump 52 discharges the refrigerant from the motor 2. The suction port P5 of the discharge pump 52 is connected to the outlet port P6 of the motor 2 through the third pipe 3c of the refrigerant circulation circuit 3. The discharge port P7 of the discharge pump 52 is connected to the introduction port P8 of the tank 4 via the fourth pipe 3d of the refrigerant circulation circuit 3. The discharge pump 52 sucks the refrigerant in the motor 2 from the suction port P5 through the third pipe 3c. The discharge pump 52 discharges the sucked refrigerant from the discharge port P7. The refrigerant discharged from the discharge port P7 flows to the introduction port P8 of the tank 4 through the fourth pipe 3d. Thereby, the discharge pump 52 discharges the refrigerant from the motor 2.
　ここで、第１実施形態に係る電動車両の制御装置１では、上記導入ポンプ５１及び排出ポンプ５２が、モータ２内における冷媒の液位を調整する冷媒液位調整部として機能する。 Here, in the control apparatus 1 for an electric vehicle according to the first embodiment, the introduction pump 51 and the discharge pump 52 function as a refrigerant level adjustment unit that adjusts the refrigerant level in the motor 2.
　勾配情報取得部６は、車両に搭載され、車両の勾配を検出する。なお、勾配情報取得部６と接続される図示しない外部装置から車両の勾配を取得することも第１実施形態における勾配情報取得部６の機能として含まれる。 The gradient information acquisition unit 6 is mounted on the vehicle and detects the gradient of the vehicle. Note that acquiring the vehicle gradient from an external device (not shown) connected to the gradient information acquisition unit 6 is also included as a function of the gradient information acquisition unit 6 in the first embodiment.
　制御部７は、ハードウェア資源として、ＣＰＵ（Central Processing Unit）、及びＭ
ＰＵ（Micro Processing Unit）の所定のプロセッサを含む。また、制御部７は、車両全
体の制御部であるＶＣＵ（Vehicle Control Unit）や、モータを制御するインバータと通信することができる。 The control unit 7 includes a CPU (Central Processing Unit) and M as hardware resources.
A predetermined processor of a PU (Micro Processing Unit) is included. The control unit 7 can communicate with a VCU (Vehicle Control Unit) that is a control unit for the entire vehicle and an inverter that controls the motor.
　第１実施形態における制御部７は、上記導入ポンプ５１及び排出ポンプ５２各々の動作を制御することにより、上記車両の駆動輪にかかる制動力を制御する。例えば、制御部７は、勾配情報取得部６により取得された車両の勾配に関する情報（勾配情報）から車両が連続的な降坂路を走行するか否かを判断する。制御部７は、車両が降坂路を走行する場合に、上記導入ポンプ５１及び排出ポンプ５２各々の動作を制御することにより、モータ２内の液位を所定液位以上とする。 The control unit 7 in the first embodiment controls the braking force applied to the drive wheels of the vehicle by controlling the operation of each of the introduction pump 51 and the discharge pump 52. For example, the control unit 7 determines whether or not the vehicle travels on a continuous downhill road from information (gradient information) related to the vehicle gradient acquired by the gradient information acquiring unit 6. When the vehicle travels on the downhill road, the control unit 7 controls the operation of each of the introduction pump 51 and the discharge pump 52 to set the liquid level in the motor 2 to a predetermined liquid level or higher.
　具体的には、制御部７は、上記車両の駆動輪に対して制動力をさらに付与する場合、排出ポンプ５２の動作を停止する。排出ポンプ５２の動作を停止するため、モータ２内から冷媒が導出されず、モータ２内で冷媒が滞留する。一方、導入ポンプ５１は、制御部７による制御により、通常動作し続ける。このため、モータ２内の冷媒の液位が上昇する。 Specifically, the control unit 7 stops the operation of the discharge pump 52 when a braking force is further applied to the drive wheels of the vehicle. Since the operation of the discharge pump 52 is stopped, the refrigerant is not led out from the motor 2 and the refrigerant stays in the motor 2. On the other hand, the introduction pump 51 continues to operate normally under the control of the control unit 7. For this reason, the liquid level of the refrigerant in the motor 2 rises.
　図２は、第１実施形態における制御部７において、上記導入ポンプ５１及び排出ポンプ５２各々の動作を制御する前後でのモータ２内の冷媒の液位を示す図である。図２（ａ）に示すように、上記導入ポンプ５１及び排出ポンプ５２各々の動作を制御する前において、モータ２内の冷媒の液位がモータ２の導出口Ｐ６の高さと略一致している。一方、図２（ｂ）に示すように、上記導入ポンプ５１及び排出ポンプ５２各々の動作を制御した後において、モータ２内の冷媒の液位がモータ２の導入口Ｐ４の高さと略一致している。すなわち、上記導入ポンプ５１及び排出ポンプ５２各々の動作を制御することで、モータ２内の冷媒の液位が上昇していることがわかる。 FIG. 2 is a diagram showing the liquid level of the refrigerant in the motor 2 before and after controlling the operation of each of the introduction pump 51 and the discharge pump 52 in the control unit 7 according to the first embodiment. As shown in FIG. 2A, before the operation of each of the introduction pump 51 and the discharge pump 52 is controlled, the liquid level of the refrigerant in the motor 2 substantially matches the height of the outlet P6 of the motor 2. . On the other hand, as shown in FIG. 2B, after controlling the operation of each of the introduction pump 51 and the discharge pump 52, the liquid level of the refrigerant in the motor 2 substantially coincides with the height of the introduction port P4 of the motor 2. ing. That is, it is understood that the liquid level of the refrigerant in the motor 2 is increased by controlling the operations of the introduction pump 51 and the discharge pump 52.
　モータ２内の冷媒の液位の上昇に伴い、冷媒による流体摩擦が上昇する。これにより、モータ２による駆動力の発生が制限される。すなわち、第１実施形態に係る電動車両の制御装置１は、上記車両の駆動輪に制動力をさらに付与することができる。 As the liquid level of the refrigerant in the motor 2 increases, fluid friction due to the refrigerant increases. Thereby, generation | occurrence | production of the driving force by the motor 2 is restrict | limited. That is, the control device 1 for an electric vehicle according to the first embodiment can further apply a braking force to the drive wheels of the vehicle.
　上述の通り、第１実施形態に係る電動車両の制御装置１は、冷媒循環回路３、導入ポンプ５１、排出ポンプ５２、及び制御部７を含む。冷媒循環回路３では、モータ２内に導入されることによりモータ２を冷却する冷媒が循環する。導入ポンプ５１は、モータ２内に冷媒を導入する。排出ポンプ５２は、モータ２内から冷媒を排出する。制御部７は、上記導入ポンプ５１及び排出ポンプ５２各々の動作を制御することにより、上記車両の駆動輪にかかる制動力を制御する。 As described above, the control device 1 for an electric vehicle according to the first embodiment includes the refrigerant circulation circuit 3, the introduction pump 51, the discharge pump 52, and the control unit 7. In the refrigerant circulation circuit 3, the refrigerant for cooling the motor 2 is circulated by being introduced into the motor 2. The introduction pump 51 introduces a refrigerant into the motor 2. The discharge pump 52 discharges the refrigerant from the motor 2. The controller 7 controls the braking force applied to the drive wheels of the vehicle by controlling the operation of each of the introduction pump 51 and the discharge pump 52.
　例えば、制御部７は、排出ポンプ５２の動作を停止する。排出ポンプ５２の動作を停止するため、モータ２内から冷媒が導出されず、モータ２内で冷媒が滞留する。一方、導入ポンプ５１は、制御部７による制御により、通常動作し続ける。このため、モータ２内の冷媒の液位が上昇する。モータ２内の冷媒の液位の上昇に伴い、冷媒による流体摩擦が上昇する。これにより、モータ２による駆動力の発生が制限される。すなわち、第１実施形態に係る電動車両の制御装置１は、上記車両の駆動輪に制動力をさらに付与することができる。したがって、第１実施形態に係る電動車両の制御装置１は、モータの回生制御を実行しなくても、上記車両の駆動輪に制動力をさらに付与することができる。 For example, the control unit 7 stops the operation of the discharge pump 52. Since the operation of the discharge pump 52 is stopped, the refrigerant is not led out from the motor 2 and the refrigerant stays in the motor 2. On the other hand, the introduction pump 51 continues to operate normally under the control of the control unit 7. For this reason, the liquid level of the refrigerant in the motor 2 rises. As the liquid level of the refrigerant in the motor 2 increases, fluid friction due to the refrigerant increases. Thereby, generation | occurrence | production of the driving force by the motor 2 is restrict | limited. That is, the control device 1 for an electric vehicle according to the first embodiment can further apply a braking force to the drive wheels of the vehicle. Therefore, the control apparatus 1 for an electric vehicle according to the first embodiment can further apply a braking force to the drive wheels of the vehicle without performing regenerative control of the motor.
　これにより、第１実施形態に係る電動車両の制御装置１は、バッテリの劣化および電費悪化を抑制することができる。また、第１実施形態に係る電動車両の制御装置１は、冷媒をモータ２内に導入、又はモータ２内から排出するために用いられていた既存の装置を利用することで上記車両の駆動輪に制動力を付与することができる。このため、新たな装置を導入することなく、第１実施形態に係る電動車両の制御装置１を実現でき、かつ新たな装置を導入するためのコストを抑制することができる。また、第１実施形態に係る電動車両の制御装置１は、排出ポンプ５２により早急にモータ２内の液位を低下させることができる。このため、第１実施形態に係る電動車両の制御装置１は、制動力の付与時から通常動作時へモータ２の状態に戻す応答性を向上することができる。 Thereby, the control device 1 for the electric vehicle according to the first embodiment can suppress the deterioration of the battery and the deterioration of the electric power consumption. Moreover, the control apparatus 1 of the electric vehicle which concerns on 1st Embodiment uses the existing apparatus used in order to introduce | transduce a refrigerant | coolant in the motor 2, or to discharge | emit it from the motor 2, thereby driving wheels of the vehicle. A braking force can be applied to the. For this reason, the control apparatus 1 for the electric vehicle according to the first embodiment can be realized without introducing a new device, and the cost for introducing the new device can be suppressed. In addition, the control device 1 for an electric vehicle according to the first embodiment can quickly reduce the liquid level in the motor 2 by the discharge pump 52. For this reason, the control apparatus 1 of the electric vehicle which concerns on 1st Embodiment can improve the responsiveness which returns the state of the motor 2 from the time of provision of braking force to the time of normal operation.
　ここで、第１実施形態における制御部７は、車両の駆動輪に制動力をさらに付与する場合、排出ポンプ５２の動作を停止させ、導入ポンプ５１を通常動作させている。例えば、第１実施形態における制御部７は、車両の駆動輪に制動力を付与する場合、導入ポンプ５１から吐出される冷媒の吐出量を排出ポンプ５２から吐出される冷媒の吐出量より増加させるように、上記導入ポンプ５１及び排出ポンプ５２各々を制御してもよい。例えば、制御部７は、導入ポンプ５１から吐出される冷媒の吐出量を増加させ、排出ポンプ５２を通常動作させる。また、制御部７は、導入ポンプ５１から吐出される冷媒の吐出量を増加させ、排出ポンプ５２から吐出される冷媒の吐出量を減少させる。また、制御部７は、導入ポンプ５１を通常動作させ、排出ポンプ５２から吐出される冷媒の吐出量を減少させる。 Here, the control unit 7 in the first embodiment stops the operation of the discharge pump 52 and operates the introduction pump 51 normally when further applying a braking force to the drive wheels of the vehicle. For example, the control unit 7 in the first embodiment increases the discharge amount of the refrigerant discharged from the introduction pump 51 more than the discharge amount of the refrigerant discharged from the discharge pump 52 when the braking force is applied to the driving wheels of the vehicle. As described above, each of the introduction pump 51 and the discharge pump 52 may be controlled. For example, the control unit 7 increases the discharge amount of the refrigerant discharged from the introduction pump 51 and operates the discharge pump 52 normally. Further, the control unit 7 increases the discharge amount of the refrigerant discharged from the introduction pump 51 and decreases the discharge amount of the refrigerant discharged from the discharge pump 52. In addition, the control unit 7 operates the introduction pump 51 normally to reduce the discharge amount of the refrigerant discharged from the discharge pump 52.
　一般に、モータ２内で冷媒が滞留する場合、モータ２内の冷媒の温度が徐々に上昇する。これにより、発熱部位の冷却不足に伴うモータ２内の部品故障等、予見しない事態が生じることが考えられる。このため、排出ポンプ５２により一定量の冷媒をモータ２内から排出しつつ、モータ２内の冷媒の液位を上昇させる。これにより、第１実施形態に係る電動車両の制御装置１は、冷媒によるモータ２の冷却性能を保ちつつ、車両の駆動輪に制動力を付与することができる。 Generally, when the refrigerant stays in the motor 2, the temperature of the refrigerant in the motor 2 gradually increases. As a result, it is conceivable that an unforeseen situation may occur, such as a component failure in the motor 2 due to insufficient cooling of the heat generation part. For this reason, the liquid level of the refrigerant in the motor 2 is raised while discharging a certain amount of refrigerant from the motor 2 by the discharge pump 52. Thereby, the control apparatus 1 of the electric vehicle which concerns on 1st Embodiment can provide a braking force to the driving wheel of a vehicle, maintaining the cooling performance of the motor 2 by a refrigerant | coolant.
　また、第１実施形態における制御部７は、車両の駆動輪に制動力を付与する場合、排出ポンプ５２の動作を停止するだけでなく、導入ポンプ５１から吐出される冷媒の吐出量を増加させてもよい。これにより、モータ２内の冷媒の液位を早急に上昇することができる。すなわち、第１実施形態に係る電動車両の制御装置１は、車両の駆動輪に早急に制動力を付与することができる。 The control unit 7 in the first embodiment not only stops the operation of the discharge pump 52 but also increases the discharge amount of the refrigerant discharged from the introduction pump 51 when applying braking force to the drive wheels of the vehicle. May be. Thereby, the liquid level of the refrigerant | coolant in the motor 2 can be raised rapidly. That is, the control device 1 for an electric vehicle according to the first embodiment can quickly apply a braking force to the drive wheels of the vehicle.
（第２実施形態）
　図３は、第２実施形態に係る電動車両の制御装置８を示す模式図である。図３に示す電動車両の制御装置８は、上記第１実施形態に係る電動車両の制御装置１に含まれる排出ポンプ５２を、冷媒循環回路３を遮断するバルブ９に置き換えたものである。なお、第２実施形態では、上記第１実施形態と重複する記載を省略し、第１実施形態と異なる部分を主として説明することとする。 (Second Embodiment)
FIG. 3 is a schematic diagram showing a control device 8 for an electric vehicle according to the second embodiment. The electric vehicle control device 8 shown in FIG. 3 is obtained by replacing the discharge pump 52 included in the electric vehicle control device 1 according to the first embodiment with a valve 9 that shuts off the refrigerant circulation circuit 3. In the second embodiment, descriptions overlapping with those in the first embodiment are omitted, and portions different from the first embodiment will be mainly described.
　図３に示すバルブ９は、例えば、制御部１０による制御により開閉する二方向電磁弁である。バルブ９の導入口Ｐ９は、第３配管３ｃを介して、モータ２の導出口Ｐ６に接続される。バルブ９の導出口Ｐ１０は、第４配管３ｄを介して、タンク４の導入口Ｐ８に接続される。 3 is a two-way electromagnetic valve that opens and closes under the control of the control unit 10, for example. The inlet P9 of the valve 9 is connected to the outlet P6 of the motor 2 via the third pipe 3c. The outlet P10 of the valve 9 is connected to the inlet P8 of the tank 4 via the fourth pipe 3d.
　ここで、第２実施形態に係る電動車両の制御装置８では、上記導入ポンプ５１及びバルブ９が、モータ２内における冷媒の液位を調整する冷媒液位調整部として機能する。 Here, in the control apparatus 8 for an electric vehicle according to the second embodiment, the introduction pump 51 and the valve 9 function as a refrigerant liquid level adjusting unit that adjusts the liquid level of the refrigerant in the motor 2.
　制御部１０は、ハードウェア資源として、ＣＰＵ、及びＭＰＵの所定のプロセッサを含む。制御部１０は、上記導入ポンプ５１及びバルブ９各々の動作を制御することにより、上記車両の駆動輪にかかる制動力を制御する。例えば、制御部１０は、勾配情報取得部６により取得された勾配情報から車両が連続的な降坂路を走行するか否かを判断する。制御部１０は、車両が降坂路を走行する場合に、上記導入ポンプ５１及びバルブ９各々の動作を制御することにより、モータ２内の液位を所定液位以上とする。 The control unit 10 includes a CPU and a predetermined processor of MPU as hardware resources. The control unit 10 controls the braking force applied to the drive wheels of the vehicle by controlling the operations of the introduction pump 51 and the valve 9. For example, the control unit 10 determines whether or not the vehicle travels on a continuous downhill road from the gradient information acquired by the gradient information acquisition unit 6. When the vehicle travels on a downhill road, the control unit 10 controls the operation of the introduction pump 51 and the valve 9 to set the liquid level in the motor 2 to a predetermined liquid level or higher.
　具体的には、制御部１０は、上記車両の駆動輪に制動力を付与する場合、バルブ９を閉鎖する。バルブ９を閉鎖するため、モータ２内から冷媒が導出されず、モータ２内で冷媒が滞留する。一方、導入ポンプ５１は、制御部１０による制御により、通常動作し続ける。このため、モータ２内の冷媒の液位が上昇する。 Specifically, the control unit 10 closes the valve 9 when applying a braking force to the drive wheels of the vehicle. Since the valve 9 is closed, the refrigerant is not led out from the motor 2 and the refrigerant stays in the motor 2. On the other hand, the introduction pump 51 continues to operate normally under the control of the control unit 10. For this reason, the liquid level of the refrigerant in the motor 2 rises.
　モータ２内の冷媒の液位の上昇に伴い、冷媒による流体摩擦が上昇する。これにより、モータ２による駆動力の発生が制限される。すなわち、第２実施形態に係る電動車両の制御装置８は、上記車両の駆動輪に制動力を付与することができる。 As the liquid level of the refrigerant in the motor 2 increases, fluid friction due to the refrigerant increases. Thereby, generation | occurrence | production of the driving force by the motor 2 is restrict | limited. That is, the control device 8 for an electric vehicle according to the second embodiment can apply a braking force to the drive wheels of the vehicle.
　上述の通り、第２実施形態に係る電動車両の制御装置８は、冷媒循環回路３、導入ポンプ５１、バルブ９、及び制御部１０を含む。冷媒循環回路３では、モータ２内に導入されることによりモータ２を冷却する冷媒が循環する。導入ポンプ５１は、モータ２内に冷媒を導入する。バルブ９は、冷媒循環回路３を遮断する。制御部１０は、上記導入ポンプ５１及びバルブ９各々の動作を制御することにより、上記車両の駆動輪にかかる制動力を制御する。 As described above, the control device 8 for an electric vehicle according to the second embodiment includes the refrigerant circulation circuit 3, the introduction pump 51, the valve 9, and the control unit 10. In the refrigerant circulation circuit 3, the refrigerant for cooling the motor 2 is circulated by being introduced into the motor 2. The introduction pump 51 introduces a refrigerant into the motor 2. The valve 9 blocks the refrigerant circulation circuit 3. The control unit 10 controls the braking force applied to the drive wheels of the vehicle by controlling the operations of the introduction pump 51 and the valve 9.
　例えば、制御部１０は、バルブ９を閉鎖する。バルブ９を閉鎖するため、モータ２内から冷媒が導出されず、モータ２内で冷媒が滞留する。一方、導入ポンプ５１は、制御部１０による制御により、通常動作し続ける。このため、モータ２内の冷媒の液位が上昇する。モータ２内の冷媒の液位の上昇に伴い、冷媒による流体摩擦が上昇する。これにより、モータ２による駆動力の発生が制限される。すなわち、第２実施形態に係る電動車両の制御装置８は、上記車両の駆動輪に制動力を付与することができる。したがって、第２実施形態に係る電動車両の制御装置８は、モータの回生制御を実行しなくても、上記車両の駆動輪に制動力をさらに付与することができる。 For example, the control unit 10 closes the valve 9. Since the valve 9 is closed, the refrigerant is not led out from the motor 2 and the refrigerant stays in the motor 2. On the other hand, the introduction pump 51 continues to operate normally under the control of the control unit 10. For this reason, the liquid level of the refrigerant in the motor 2 rises. As the liquid level of the refrigerant in the motor 2 increases, fluid friction due to the refrigerant increases. Thereby, generation | occurrence | production of the driving force by the motor 2 is restrict | limited. That is, the control device 8 for an electric vehicle according to the second embodiment can apply a braking force to the drive wheels of the vehicle. Therefore, the control device 8 for an electric vehicle according to the second embodiment can further apply a braking force to the drive wheels of the vehicle without performing regenerative control of the motor.
　これにより、第２実施形態に係る電動車両の制御装置８は、バッテリの劣化および電費悪化を抑制することができる。また、第２実施形態に係る電動車両の制御装置８は、排出ポンプ５２の代わりにバルブ９を用いることで、排出ポンプ５２と比較して、冷媒循環回路３を早急に遮断することができる。これにより、モータ２内の冷媒の液位を早急に上昇することができる。すなわち、第２実施形態に係る電動車両の制御装置８は、車両の駆動輪に早急に制動力を付与することができる。 Thereby, the control device 8 for the electric vehicle according to the second embodiment can suppress the deterioration of the battery and the deterioration of the power consumption. In addition, the control device 8 for an electric vehicle according to the second embodiment can quickly shut off the refrigerant circulation circuit 3 as compared with the discharge pump 52 by using the valve 9 instead of the discharge pump 52. Thereby, the liquid level of the refrigerant | coolant in the motor 2 can be raised rapidly. That is, the control device 8 for an electric vehicle according to the second embodiment can quickly apply a braking force to the drive wheels of the vehicle.
（第３実施形態）
　図４は、第３実施形態に係る電動車両の制御装置１１を示す模式図である。図４に示す電動車両の制御装置１１は、上記第１実施形態に係る電動車両の制御装置１に、冷媒循環回路３を遮断するバルブ９をさらに設置したものである。なお、第３実施形態では、上記第１実施形態及び第２実施形態と重複する記載を省略し、第１実施形態及び第２実施形態と異なる部分を主として説明することとする。 (Third embodiment)
FIG. 4 is a schematic diagram showing a control device 11 for an electric vehicle according to the third embodiment. The electric vehicle control device 11 shown in FIG. 4 is a device in which a valve 9 that shuts off the refrigerant circulation circuit 3 is further installed in the electric vehicle control device 1 according to the first embodiment. In the third embodiment, the description overlapping with the first embodiment and the second embodiment is omitted, and portions different from the first embodiment and the second embodiment will be mainly described.
　図４に示す冷媒循環回路３は、第１配管３ａ、第２配管３ｂ、第３配管３ｃ、第４配管３ｄ、及び第５配管３ｅにより構成される。 4 includes a first pipe 3a, a second pipe 3b, a third pipe 3c, a fourth pipe 3d, and a fifth pipe 3e.
　図４に示すバルブ９は、例えば、制御部１２による制御により開閉する二方向電磁弁である。バルブ９の導入口Ｐ９は、第５配管３ｅを介して、モータ２の導出口Ｐ６に接続される。バルブ９の導出口Ｐ１０は、第３配管３ｃを介して、排出ポンプ５２の吸入口Ｐ５に接続される。排出ポンプ５２の吐出口Ｐ７は、第４配管３ｄを介して、タンク４の導入口Ｐ８に接続される。なお、第３実施形態に係る電動車両の制御装置１１において、排出ポンプ５２及びバルブ９の設置箇所を入れ替えてもよい。 4 is a two-way electromagnetic valve that opens and closes under the control of the control unit 12, for example. The inlet P9 of the valve 9 is connected to the outlet P6 of the motor 2 via the fifth pipe 3e. The outlet P10 of the valve 9 is connected to the inlet P5 of the discharge pump 52 via the third pipe 3c. The discharge port P7 of the discharge pump 52 is connected to the introduction port P8 of the tank 4 via the fourth pipe 3d. In addition, in the control apparatus 11 of the electric vehicle which concerns on 3rd Embodiment, you may replace the installation location of the discharge pump 52 and the valve 9.
　ここで、第３実施形態に係る電動車両の制御装置１１では、上記導入ポンプ５１、排出ポンプ５２及びバルブ９が、モータ２内における冷媒の液位を調整する冷媒液位調整部として機能する。 Here, in the control apparatus 11 for an electric vehicle according to the third embodiment, the introduction pump 51, the discharge pump 52, and the valve 9 function as a refrigerant liquid level adjusting unit that adjusts the liquid level of the refrigerant in the motor 2.
　制御部１２は、ハードウェア資源として、ＣＰＵ、及びＭＰＵの所定のプロセッサを含む。制御部１２は、上記導入ポンプ５１、排出ポンプ５２及びバルブ９各々の動作を制御することで、上記車両の駆動輪にかかる制動力を制御する。例えば、制御部１２は、勾配情報取得部６により取得された勾配情報から車両が連続的な降坂路を走行するか否かを判断する。制御部１２は、車両が降坂路を走行する場合に、上記導入ポンプ５１、排出ポンプ５２及びバルブ９各々の動作を制御することにより、モータ２内の液位を所定液位以上とする。 The control unit 12 includes a CPU and a predetermined processor of MPU as hardware resources. The control unit 12 controls the braking force applied to the drive wheels of the vehicle by controlling the operations of the introduction pump 51, the discharge pump 52, and the valve 9. For example, the control unit 12 determines whether or not the vehicle travels on a continuous downhill road from the gradient information acquired by the gradient information acquisition unit 6. When the vehicle travels on a downhill road, the control unit 12 controls the operation of each of the introduction pump 51, the discharge pump 52, and the valve 9 to set the liquid level in the motor 2 to a predetermined liquid level or higher.
　具体的には、制御部１２は、上記車両の駆動輪に対して制動力をさらに付与する場合、排出ポンプ５２の動作を停止する。また、制御部１２は、バルブ９を閉鎖する。バルブ９を閉鎖するため、モータ２内から冷媒が導出されず、モータ２内で冷媒が滞留する。一方、導入ポンプ５１は、制御部１２による制御により、通常動作し続ける。このため、モータ２内の冷媒の液位が上昇する。 Specifically, the control unit 12 stops the operation of the discharge pump 52 when further applying a braking force to the drive wheels of the vehicle. Further, the control unit 12 closes the valve 9. Since the valve 9 is closed, the refrigerant is not led out from the motor 2 and the refrigerant stays in the motor 2. On the other hand, the introduction pump 51 continues to operate normally under the control of the control unit 12. For this reason, the liquid level of the refrigerant in the motor 2 rises.
　モータ２内の冷媒の液位の上昇に伴い、冷媒による流体摩擦が上昇する。これにより、モータ２による駆動力の発生が制限される。すなわち、第３実施形態に係る電動車両の制御装置１１は、上記車両の駆動輪に制動力を付与することができる。 As the liquid level of the refrigerant in the motor 2 increases, fluid friction due to the refrigerant increases. Thereby, generation | occurrence | production of the driving force by the motor 2 is restrict | limited. That is, the control device 11 for an electric vehicle according to the third embodiment can apply a braking force to the drive wheels of the vehicle.
　上述の通り、第３実施形態に係る電動車両の制御装置１１は、冷媒循環回路３、導入ポンプ５１、排出ポンプ５２、バルブ９、及び制御部１２を含む。冷媒循環回路３では、モータ２内に導入されることによりモータ２を冷却する冷媒が循環する。導入ポンプ５１は、モータ２内に冷媒を導入する。排出ポンプ５２は、モータ２内から冷媒を排出する。バルブ９は、冷媒循環回路３を遮断する。制御部１２は、上記導入ポンプ５１、排出ポンプ５２及びバルブ９各々の動作を制御することにより、上記車両の駆動輪にかかる制動力を制御する。 As described above, the control device 11 for an electric vehicle according to the third embodiment includes the refrigerant circulation circuit 3, the introduction pump 51, the discharge pump 52, the valve 9, and the control unit 12. In the refrigerant circulation circuit 3, the refrigerant for cooling the motor 2 is circulated by being introduced into the motor 2. The introduction pump 51 introduces a refrigerant into the motor 2. The discharge pump 52 discharges the refrigerant from the motor 2. The valve 9 blocks the refrigerant circulation circuit 3. The control unit 12 controls the braking force applied to the driving wheels of the vehicle by controlling the operations of the introduction pump 51, the discharge pump 52, and the valve 9.
　例えば、制御部１２は、排出ポンプ５２の動作を停止する。また、制御部１２は、バルブ９を閉鎖する。バルブ９を閉鎖するため、モータ２内から冷媒が導出されず、モータ２内で冷媒が滞留する。一方、導入ポンプ５１は、制御部１２による制御により、通常動作し続ける。このため、モータ２内の冷媒の液位が上昇する。モータ２内の冷媒の液位の上昇に伴い、冷媒による流体摩擦が上昇する。これにより、モータ２による駆動力の発生が制限される。すなわち、第３実施形態に係る電動車両の制御装置１１は、上記車両の駆動輪に制動力を付与することができる。したがって、第３実施形態に係る電動車両の制御装置１１は、モータの回生制御を実行しなくても、上記車両の駆動輪に制動力をさらに付与することができる。 For example, the control unit 12 stops the operation of the discharge pump 52. Further, the control unit 12 closes the valve 9. Since the valve 9 is closed, the refrigerant is not led out from the motor 2 and the refrigerant stays in the motor 2. On the other hand, the introduction pump 51 continues to operate normally under the control of the control unit 12. For this reason, the liquid level of the refrigerant in the motor 2 rises. As the liquid level of the refrigerant in the motor 2 increases, fluid friction due to the refrigerant increases. Thereby, generation | occurrence | production of the driving force by the motor 2 is restrict | limited. That is, the control device 11 for an electric vehicle according to the third embodiment can apply a braking force to the drive wheels of the vehicle. Therefore, the control device 11 for an electric vehicle according to the third embodiment can further apply a braking force to the drive wheels of the vehicle without performing regenerative control of the motor.
　これにより、第３実施形態に係る電動車両の制御装置１１は、バッテリの劣化および電費悪化を抑制することができる。また、第３実施形態に係る電動車両の制御装置１１は、排出ポンプ５２により早急にモータ２内の液位を低下させることができる。このため、第３実施形態に係る電動車両の制御装置１１は、制動力の付与時から通常動作時へモータ２の状態に戻す応答性を向上することができる。また、第３実施形態に係る電動車両の制御装置１１は、バルブ９を用いることで、冷媒循環回路３を早急に遮断することができる。これにより、モータ２内の冷媒の液位を早急に上昇することができる。すなわち、第３実施形態に係る電動車両の制御装置１１は、車両の駆動輪に早急に制動力を付与することができる。 Thereby, the control device 11 of the electric vehicle according to the third embodiment can suppress the deterioration of the battery and the deterioration of the power consumption. Moreover, the control apparatus 11 of the electric vehicle which concerns on 3rd Embodiment can reduce the liquid level in the motor 2 rapidly with the discharge pump 52. FIG. For this reason, the control apparatus 11 of the electric vehicle which concerns on 3rd Embodiment can improve the responsiveness which returns the state of the motor 2 from the time of provision of braking force to the time of normal operation. Moreover, the control apparatus 11 of the electric vehicle which concerns on 3rd Embodiment can interrupt | block the refrigerant | coolant circulation circuit 3 rapidly by using the valve | bulb 9. FIG. Thereby, the liquid level of the refrigerant | coolant in the motor 2 can be raised rapidly. That is, the control device 11 for an electric vehicle according to the third embodiment can quickly apply a braking force to the drive wheels of the vehicle.
　ここで、第３実施形態における制御部１２は、車両の駆動輪に制動力を付与する場合、排出ポンプ５２の動作を停止し、バルブ９を閉鎖するだけでなく、導入ポンプ５１から吐出される冷媒の吐出量を増加させてもよい。これにより、モータ２内の冷媒の液位を早急に上昇することができる。すなわち、第３実施形態に係る電動車両の制御装置１１は、車両の駆動輪に早急に制動力を付与することができる。 Here, when applying a braking force to the driving wheels of the vehicle, the control unit 12 in the third embodiment not only stops the operation of the discharge pump 52 and closes the valve 9 but also discharges from the introduction pump 51. The discharge amount of the refrigerant may be increased. Thereby, the liquid level of the refrigerant | coolant in the motor 2 can be raised rapidly. That is, the control device 11 for an electric vehicle according to the third embodiment can quickly apply a braking force to the drive wheels of the vehicle.
　また、第３実施形態に係る電動車両の制御装置１１において、上記バルブ９として、逆止弁を用いてもよい。逆止弁は、冷媒循環回路３を流れる冷媒が逆流することを防ぐためのものである。上記逆止弁は、逆止弁の前後の液圧の差が所定の閾値以上となった場合に、開放するようになっている。第３実施形態に係る電動車両の制御装置１１は、上記バルブ９として逆止弁を用いることで、液圧が急激に上昇した場合に一定量流すことができ、液圧を一定の数値まで低下させることができる。このため、第３実施形態に係る電動車両の制御装置１１は、冷媒循環回路３の破損を防止することができる。また、第３実施形態に係る電動車両の制御装置１１は、上記破損による冷媒漏れを防止することができる。 Further, in the control device 11 for an electric vehicle according to the third embodiment, a check valve may be used as the valve 9. The check valve is for preventing the refrigerant flowing through the refrigerant circulation circuit 3 from flowing backward. The check valve is opened when the difference between the hydraulic pressures before and after the check valve exceeds a predetermined threshold. The control device 11 of the electric vehicle according to the third embodiment uses a check valve as the valve 9 so that a certain amount can flow when the fluid pressure suddenly increases, and the fluid pressure is reduced to a certain value. Can be made. For this reason, the control device 11 for the electric vehicle according to the third embodiment can prevent the refrigerant circulation circuit 3 from being damaged. Moreover, the control apparatus 11 of the electric vehicle which concerns on 3rd Embodiment can prevent the refrigerant | coolant leakage by the said damage.
（第４実施形態）
　図５は、第４実施形態に係る電動車両の制御装置１３を示す模式図である。図５に示す電動車両の制御装置１３は、上記実施形態と異なり、導入ポンプ５１のみで実現したものである。なお、第３実施形態では、上記第１実施形態乃至第３実施形態と重複する記載を省略し、第１実施形態乃至第３実施形態と異なる部分を主として説明することとする。 (Fourth embodiment)
FIG. 5 is a schematic diagram showing the control device 13 for an electric vehicle according to the fourth embodiment. The control device 13 for the electric vehicle shown in FIG. 5 is realized only by the introduction pump 51, unlike the above embodiment. In the third embodiment, descriptions overlapping with the first to third embodiments are omitted, and different parts from the first to third embodiments are mainly described.
　ここで、モータ２の導出口Ｐ６は、第５配管３ｅを介して、タンク４の導入口Ｐ８に接続される。第４実施形態に係る電動車両の制御装置１３では、上記導入ポンプ５１が、モータ２内における冷媒の液位を調整する冷媒液位調整部として機能する。 Here, the outlet P6 of the motor 2 is connected to the inlet P8 of the tank 4 via the fifth pipe 3e. In the control device 13 for an electric vehicle according to the fourth embodiment, the introduction pump 51 functions as a refrigerant liquid level adjusting unit that adjusts the liquid level of the refrigerant in the motor 2.
　制御部１４は、ハードウェア資源として、ＣＰＵ、及びＭＰＵの所定のプロセッサを含む。制御部１４は、上記導入ポンプ５１の動作を制御することにより、上記車両の駆動輪にかかる制動力を制御する。例えば、制御部１４は、勾配情報取得部６により取得された勾配情報から車両が連続的な降坂路を走行するか否かを判断する。制御部１４は、車両が降坂路を走行する場合に、上記導入ポンプ５１の動作を制御することにより、モータ２内の液位を所定液位以上とする。 The control unit 14 includes a CPU and a predetermined processor of MPU as hardware resources. The control unit 14 controls the braking force applied to the drive wheels of the vehicle by controlling the operation of the introduction pump 51. For example, the control unit 14 determines whether or not the vehicle travels on a continuous downhill road from the gradient information acquired by the gradient information acquisition unit 6. When the vehicle travels on a downhill road, the control unit 14 controls the operation of the introduction pump 51 to set the liquid level in the motor 2 to a predetermined liquid level or higher.
　具体的には、制御部１４は、上記車両の駆動輪に対して制動力をさらに付与する場合、導入ポンプ５１からモータ２への冷媒の導入量がモータ２からの冷媒の導出量より多くなるように導入ポンプ５１からの冷媒の吐出量を制御する。このため、モータ２内の冷媒の液位が上昇する。 Specifically, when the control unit 14 further applies a braking force to the drive wheels of the vehicle, the amount of refrigerant introduced from the introduction pump 51 to the motor 2 is larger than the amount of refrigerant drawn from the motor 2. Thus, the discharge amount of the refrigerant from the introduction pump 51 is controlled. For this reason, the liquid level of the refrigerant in the motor 2 rises.
　モータ２内の冷媒の液位の上昇に伴い、冷媒による流体摩擦が上昇する。これにより、モータ２による駆動力の発生が制限される。すなわち、第４実施形態に係る電動車両の制御装置１３は、上記車両の駆動輪に制動力をさらに付与することができる。 As the liquid level of the refrigerant in the motor 2 increases, fluid friction due to the refrigerant increases. Thereby, generation | occurrence | production of the driving force by the motor 2 is restrict | limited. That is, the control device 13 for an electric vehicle according to the fourth embodiment can further apply a braking force to the drive wheels of the vehicle.
　上述の通り、第４実施形態に係る電動車両の制御装置１３は、冷媒循環回路３、導入ポンプ５１、及び制御部１４を含む。冷媒循環回路３では、モータ２内に導入されることによりモータ２を冷却する冷媒が循環する。導入ポンプ５１は、モータ２内に冷媒を導入する。制御部１４は、上記導入ポンプ５１の動作を制御することにより、上記車両の駆動輪にかかる制動力を制御する。 As described above, the control device 13 for the electric vehicle according to the fourth embodiment includes the refrigerant circulation circuit 3, the introduction pump 51, and the control unit 14. In the refrigerant circulation circuit 3, the refrigerant for cooling the motor 2 is circulated by being introduced into the motor 2. The introduction pump 51 introduces a refrigerant into the motor 2. The control unit 14 controls the braking force applied to the drive wheels of the vehicle by controlling the operation of the introduction pump 51.
　例えば、制御部１４は、導入ポンプ５１からモータ２への冷媒の導入量がモータ２からの冷媒の導出量より多くなるように導入ポンプ５１からの冷媒の吐出量を制御する。このため、モータ２内の冷媒の液位が上昇する。モータ２内の冷媒の液位の上昇に伴い、冷媒による流体摩擦が上昇する。これにより、モータ２による駆動力の発生が制限される。すなわち、第４実施形態に係る電動車両の制御装置１３は、上記車両の駆動輪に制動力をさらに付与することができる。したがって、第４実施形態に係る電動車両の制御装置１３は、モータの回生制御を実行しなくても、上記車両の駆動輪に制動力をさらに付与することができる。 For example, the control unit 14 controls the amount of refrigerant discharged from the introduction pump 51 so that the amount of refrigerant introduced from the introduction pump 51 to the motor 2 is greater than the amount of refrigerant derived from the motor 2. For this reason, the liquid level of the refrigerant in the motor 2 rises. As the liquid level of the refrigerant in the motor 2 increases, fluid friction due to the refrigerant increases. Thereby, generation | occurrence | production of the driving force by the motor 2 is restrict | limited. That is, the control device 13 for an electric vehicle according to the fourth embodiment can further apply a braking force to the drive wheels of the vehicle. Therefore, the control device 13 for an electric vehicle according to the fourth embodiment can further apply a braking force to the drive wheels of the vehicle without performing regenerative control of the motor.
　これにより、第４実施形態に係る電動車両の制御装置１３は、バッテリの劣化および電費悪化を抑制することができる。また、第４実施形態に係る電動車両の制御装置１３は、最小限の構成で実現することができるため、設置のための導入コストを抑制することができる。 Thereby, the control device 13 for the electric vehicle according to the fourth embodiment can suppress the deterioration of the battery and the deterioration of the power consumption. Moreover, since the control apparatus 13 of the electric vehicle which concerns on 4th Embodiment can be implement | achieved with the minimum structure, it can suppress the introduction cost for installation.
　ここで、上記説明において用いた「所定のプロセッサ」という文言は、例えば、専用又は汎用のプロセッサ、を意味する。また、本実施形態の各構成要素（各処理部）は、単一のプロセッサに限らず、複数のプロセッサによって実現するようにしてもよい。さらに、複数の構成要素（複数の処理部）を、単一のプロセッサによって実現するようにしてもよい。 Here, the term “predetermined processor” used in the above description means, for example, a dedicated or general-purpose processor. In addition, each component (each processing unit) of the present embodiment is not limited to a single processor, and may be realized by a plurality of processors. Furthermore, a plurality of components (a plurality of processing units) may be realized by a single processor.
　　１、８、１１、１３　電動車両の制御装置
　　２　モータ
　　３　冷媒循環回路
　　３ａ　第１配管
　　３ｂ　第２配管
　　３ｃ　第３配管
　　３ｄ　第４配管
　　３ｅ　第５配管
　　４　タンク
　　６　勾配情報取得部
　　７、１０、１２、１４　制御部
　　１５　熱交換器
　　９　バルブ
　　５１　導入ポンプ
　　５２　排出ポンプ DESCRIPTION OF SYMBOLS 1, 8, 11, 13 Control apparatus of electric vehicle 2 Motor 3 Refrigerant circuit 3a 1st piping 3b 2nd piping 3c 3rd piping 3d 4th piping 3e 5th piping 4 Tank 6 Gradient information acquisition part 7, 10, 12 , 14 Control unit 15 Heat exchanger 9 Valve 51 Introduction pump 52 Discharge pump

Claims (8)

  1. 　車両の駆動輪に駆動力を発生させるモータを搭載する電動車両の制御装置であって、
    　前記モータ内に導入されることにより前記モータを冷却する冷媒が循環する冷媒循環回路と、
    　前記モータ内における前記冷媒の液位を調整する冷媒液位調整部と、
    　前記冷媒液位調整部を制御することにより、前記駆動輪にかかる制動力を制御する制御部と、を含む、電動車両の制御装置。     A control device for an electric vehicle equipped with a motor for generating a driving force on a drive wheel of the vehicle,
    A refrigerant circulation circuit in which a refrigerant for cooling the motor is circulated by being introduced into the motor;
    A refrigerant liquid level adjusting unit that adjusts the liquid level of the refrigerant in the motor;
    And a control unit that controls a braking force applied to the drive wheel by controlling the refrigerant liquid level adjusting unit.
  2. 　前記冷媒液位調整部は、前記モータ内に前記冷媒を導入する導入ポンプ、及び前記モータ内から前記冷媒を排出する排出ポンプを含み、
    　前記制御部は、前記駆動輪に制動力を付与する場合、前記排出ポンプを制御することで、前記排出ポンプの動作を停止する、請求項１に記載の電動車両の制御装置。     The refrigerant liquid level adjusting unit includes an introduction pump for introducing the refrigerant into the motor, and a discharge pump for discharging the refrigerant from the motor.
    2. The control device for an electric vehicle according to claim 1, wherein when the braking force is applied to the drive wheel, the control unit controls the discharge pump to stop the operation of the discharge pump. 3.
  3. 　前記冷媒液位調整部は、前記冷媒循環回路を遮断するバルブをさらに含み、
    　前記制御部は、前記駆動輪に制動力を付与する場合、前記バルブを制御することで、前記バルブを閉鎖する、請求項２に記載の電動車両の制御装置。     The refrigerant liquid level adjustment unit further includes a valve that shuts off the refrigerant circulation circuit,
    The said control part is a control apparatus of the electric vehicle of Claim 2 which closes the said valve | bulb by controlling the said valve | bulb, when providing braking force to the said driving wheel.
  4. 　前記バルブは、逆支弁である、請求項３に記載の電動車両の制御装置。 The control device for an electric vehicle according to claim 3, wherein the valve is a reversely supported valve.
  5. 　前記制御部は、前記駆動輪に制動力を付与する場合、前記導入ポンプを制御することで、前記導入ポンプから吐出される前記冷媒の吐出量を増加させる、請求項２から請求項４のいずれか一項に記載の電動車両の制御装置。 The said control part increases the discharge amount of the said refrigerant | coolant discharged from the said introductory pump by controlling the said introductory pump, when providing braking force to the said driving wheel, Any of the Claims 2-4 The control apparatus of the electric vehicle as described in any one of Claims.
  6. 　前記冷媒液位調整部は、前記モータ内に前記冷媒を導入する導入ポンプ、及び前記冷媒循環回路を遮断するバルブを含み、
    　前記制御部は、前記駆動輪に制動力を付与する場合、前記バルブを制御することで、前記バルブを閉鎖する、請求項１に記載の電動車両の制御装置。     The refrigerant liquid level adjustment unit includes an introduction pump that introduces the refrigerant into the motor, and a valve that blocks the refrigerant circulation circuit.
    The said control part is a control apparatus of the electric vehicle of Claim 1 which closes the said valve | bulb by controlling the said valve | bulb, when providing braking force to the said drive wheel.
  7. 　前記冷媒液位調整部は、前記モータ内に前記冷媒を導入する導入ポンプを含み、
    　前記制御部は、前記導入ポンプから前記モータへの前記冷媒の導入量が前記モータからの前記冷媒の導出量より多くなるように、前記導入ポンプからの前記冷媒の吐出量を制御する、請求項１に記載の電動車両の制御装置。     The refrigerant liquid level adjusting unit includes an introduction pump for introducing the refrigerant into the motor,
    The said control part controls the discharge amount of the said refrigerant | coolant from the said introduction pump so that the introduction amount of the said refrigerant | coolant from the said introduction pump to the said motor may become larger than the derivation | leading-out amount of the said refrigerant | coolant from the said motor. The control apparatus of the electric vehicle of 1.
  8. 　前記車両の勾配を検出、又は外部装置から取得する勾配情報取得部をさらに含み、
    　前記制御部は、前記勾配情報取得部により取得された前記車両の勾配に関する情報から前記車両が連続的な降坂路を走行するか否かを判断し、前記車両が降坂路を走行する場合に前記冷媒液位調整部を制御する、請求項１から請求項７のいずれか一項に記載の電動車両の制御装置。     A gradient information acquisition unit for detecting the gradient of the vehicle or acquiring it from an external device;
    The control unit determines whether or not the vehicle travels on a continuous downhill road from information on the vehicle gradient acquired by the gradient information acquisition unit, and when the vehicle travels on a downhill road, The control device for an electric vehicle according to any one of claims 1 to 7, which controls the refrigerant liquid level adjustment unit.
PCT/JP2019/003819 2018-02-27 2019-02-04 Control device for electrically-driven vehicle WO2019167557A1 (en)

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WO2024052954A1 (en) * 2022-09-05 2024-03-14 日産自動車株式会社 Rotary electric machine cooling system and rotary electric machine cooling method

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JP2007057093A (en) * 2005-07-28 2007-03-08 Toyota Motor Corp Drive assembly and motor vehicle equipped with the same
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